Supersilyl as an effective monodentate ligand to stabilize four-coordinate manganese(ii) complexes

2020 ◽  
Vol 49 (48) ◽  
pp. 17537-17541
Author(s):  
Shogo Arata ◽  
Kosuke Suzuki ◽  
Kazuya Yamaguchi ◽  
Yusuke Sunada
Keyword(s):  
Monodentate Ligand

Supersilyl, –Si(SiMe3)3, serves as an effective ligand to afford a series of four-coordinate manganese(ii) complexes.

Asymmetrische Katalysen, 25 [1]. C5H5Mn(CO)2-Komplexe von optisch aktiven Chelatphosphanen als einzähnige Liganden in der enantioselektiven Katalyse / Asymmetric Catalyses, 25 [1]. C5H5Mn(CO)2 Complexes of Optically Active Chelate Phosphanes as Monodentate Ligands in Enantioselective Catalysis

1985 ◽  
Vol 40 (10) ◽  
pp. 1243-1249 ◽  
Author(s):  
Henri Brunner ◽  
Alfons Knott
Keyword(s):  
Cinnamic Acid ◽  
Enantioselective Hydrogenation ◽  
Optically Active ◽  
Enantioselective Catalysis ◽  
Dinuclear Complexes ◽  
Bidentate Ligands ◽  
Monodentate Ligand ◽  
Mononuclear Complexes ◽  
Monodentate Ligands

The chelate phosphanes Diphos, Diop, and Norphos were reacted with C5H5Mn(CO)2THF and CH3C5H4Mn(CO)2THF to give mononuclear complexes, containing the phosphanes as unidentate or as bidentate ligands, and dinuclear complexes, containing bridging phosphane ligands. In C5H5Mn(CO)2Diop one of the two P(C6H5)2 groups of Diop is coordinated to the C5H5Mn(CO)2 fragment; the uncoordinated P(C6H5)2 group makes it a monodentate ligand. C5H5Mn(CO)2Diop together with [Rh(cod)Cl]2 was used as an in situ catalyst in the enantioselective hydrogenation of (Z)-a-[N -acetam ino]cinnamic acid (78.4% ee) and in the enantioselective hydrosilylation of acetophenone with diphenylsilane (6.7% ee).

scholarly journals Novel silver(I) compounds with 1-adamantanamine

2018 ◽  
Vol 83 (6) ◽  
pp. 699-705 ◽  
Author(s):  
Dejan Jeremic ◽  
Milena Djordjevic ◽  
Srdjan Miletic ◽  
Ljubica Andjelkovic ◽  
Dusan Sladic ◽  
...  
Keyword(s):  
Electron Donor ◽  
Aliphatic Amine ◽  
Biological Activities ◽  
Spectroscopic Characterization ◽  
Antibacterial Activities ◽  
Monodentate Ligand ◽  
Donor Ligand ◽  
Minimum Inhibitory Concentrations ◽  
New Compounds

In this work, three novel silver(I) complexes with an almost completely rigid and bulky monodentate ligand, 1-adamantanamine, were synthesized. The aliphatic amine, 1-adamantanamine, is the sole electron donor ligand in these complexes. In addition to spectroscopic characterization, the basic biological activities of the new compounds were investigated and their minimum inhibitory concentrations were determined. The antifungal and antibacterial activities indicate that these compounds could potentially be applied as new therapeutics.

scholarly journals NITRATO ADDUCTS AND DERIVATIVES: SYNTHESIS AND INFRARED STUDY

2018 ◽  
Vol 23 (1) ◽  
Author(s):  
MOUHAMADOU BIRAME DIOP ◽  
LIBASSE DIOP
Keyword(s):  
Infrared Spectroscopy ◽  
Hydrogen Bonds ◽  
Infinite Chain ◽  
Monodentate Ligand ◽  
Infrared Study ◽  
Supramolecular Architectures ◽  
Trigonal Bipyramidal ◽  
Chain Type

<p>Five new nitrato adducts and derivatives have been synthesized and studied by infrared spectroscopy. The suggested structures are discrete or of infinite chain type, the nitrate behaving as a bidentate or a monodentate ligand, the environment around the tin (IV) centres being octahedral or trigonal bipyramidal. When extra hydrogen bonds are considered supramolecular architectures may be obtained.</p>

The synthesis, molecular and crystal structure of the 1:1 adduct of triphenyltin chloride with 2,3-diphenylthiazolidin-4-one

1995 ◽  
Vol 73 (1) ◽  
pp. 95-99 ◽  
Author(s):  
Frank E. Smith ◽  
Rosemary C. Hynes ◽  
John Tierney ◽  
Ying Z. Zhang ◽  
George Eng
Keyword(s):  
Crystal Structure ◽  
Structural Analysis ◽  
Oxygen Atom ◽  
Dutch Elm Disease ◽  
Monoclinic Space Group ◽  
Monodentate Ligand ◽  
X Ray ◽  
Trigonal Bipyramidal ◽  
Triphenyltin Chloride ◽  
Mössbauer Data

The title compound was synthesized as part of an effort to produce a more effective fungicide to combat Dutch Elm Disease (DED), which is caused by the fungus Ceratocystisulmi. A full X-ray structural analysis of the 1:1 adduct has been carried out and the results are reported along with the Mössbauer data for the compound. The crystals are monoclinic, space group P21/a with a = 19.240(3) Å, b = 9.1463(24) Å, c = 19.3512(24) Å, β = 118.874(8)°, V = 2982.0(10) Å3, z = 4, and Dcalc = 1.427 Mg m−3. The final discrepancy factors are RF = 0.056 and Rw = 0.058 for 1915 significant reflections. The QS and IS values in the Mössbauer spectrum of the complex are 3.08 mm s−1 and 1.28 mm s−1, respectively. The 2,3-diphenylthiazolidin-4-one behaves as a monodentate ligand and coordinates to the tin through the oxygen atom. The complex exhibits a trigonal bipyramidal configuration with the three phenyl groups in equatorial positions and the chloride and ligand oxygen occupying the apical sites. Keywords: triorganotin, fungicide, Dutch Elm Disease, thiazolidin-4-one.

scholarly journals A new lanthanum(III) complex containing acetylacetone and 1H-imidazole

2017 ◽  
Vol 73 (11) ◽  
pp. 1739-1742 ◽  
Author(s):  
Atsuya Koizumi ◽  
Takuya Hasegawa ◽  
Atsushi Itadani ◽  
Kenji Toda ◽  
Taoyun Zhu ◽  
...  
Keyword(s):  
Bidentate Ligand ◽  
Bidentate Ligands ◽  
Monodentate Ligand ◽  
Intermolecular Hydrogen Bonds ◽  
Molecular Plane ◽  
One Dimensional ◽  
Nitrate N ◽  
Dimensional Network ◽  
Monodentate Ligands ◽  
Nitrate Anions

In the title complex, diaqua(1H-imidazole-κN3)(nitrato-κ2O,O′)bis(4-oxopent-2-en-2-olato-κ2O,O′)lanthanum(III), [La(C5H7O2)2(NO3)(C3H4N2)(H2O)2], the La atom is coordinated by eight O atoms of two acetylacetonate (acac) anions acting as bidentate ligands, two water molecule as monodentate ligands, one nitrate anions as a bidentate ligand and one N atom of an imidazolate (ImH) molecule as a monodentate ligand. Thus, the coordination number of the La atom is nine in a monocapped square antiprismatic polyhedron. There are three types of intermolecular hydrogen bonds between ligands, the first involving nitrate–water O...H—O interactions running along the [001] direction, the second involving acac–water O...H—O interactions along the [010] direction and the third involving an Im–nitrate N—H...O interaction along the [100] direction (five interactions of this type). Thus, an overall one-dimensional network structure is generated. The molecular plane of an ImH molecule is almost parallel to that of a nitrate ligand, making an angle of only 6.04 (12)°. Interestingly, the ImH plane is nearly perpendicular to the planes of two neighbouring acac ligands.

tetrahedro-Tetraphosphorus as Monodentate Ligand in a Nickel(0) Complex

1979 ◽  
Vol 18 (6) ◽  
pp. 469-469 ◽  
Author(s):  
Paolo Dapporto ◽  
Stefano Midollini ◽  
Luigi Sacconi
Keyword(s):  
Monodentate Ligand

Carbonyl Halides of the Group 6 Transition Metals. XXVIII. Phosphorus-31 and Selenium-77 N.M.R. Studies of Some Selenium-Group 15 Donor Complexes

1987 ◽  
Vol 40 (1) ◽  
pp. 13 ◽  
Author(s):  
R Colton ◽  
P Panagiotidou
Keyword(s):  
Transition Metals ◽  
Silver Nitrate ◽  
The Other ◽  
Donor Atom ◽  
Monodentate Ligand ◽  
Quantitative Formation ◽  
Other Hand ◽  
Group 6 ◽  
Group 15

The ligands Ph2PCH2P(Se)Ph2 ( dpmSe ) and Ph2AsCH2CH2P(Se)Ph2 ( apeSe ) have been treated with Group 6 metal pentacarbonyl halo anions, [M(C0)5X]-, the Group 6 hexacarbonyls and the carbonyl halides M(C0)4X2 (M = Mo, W, X = C1, Br). Reaction of both dpmSe and apeSe with the anions [M(C0)5X]- in the presence of silver nitrate gave the complexes M(CO)5(L-L′) (L-L′ = dpmSe or apeSe ) with the ligand coordinated in a monodentate fashion through the Group 15 donor atom. Reaction of dpmSe with the hexacarbonyls gave only M(C0)4( dpmSe ) with the ligand chelated but, in contrast, apeSe could not be chelated to metal(0) and acted only as a monodentate ligand. These differences are rationalized in terms of the structure of the ligands. The behaviour of the ligands is much more similar in the metal(11) carbonyl halide chemistry. Both formed a mixture of two isomers of M(CO)3(L-L′)X2 (L-L′= dpmSe, apeSe ) in which the ligands are chelated . In the apeSe system, n.m.r. studies show these isomers are in an equilibrium which varies with temperature at a rate which is slow on the n.m.r. timescale, but the dpmSe complexes do not interchange. On reaction with further ligand, only one of the isomers of M(CO)3( dpmSe )X2 reacts to give incomplete formation of the dicarbonyl Mo(Co)2( dpmSe )2X2, which has one dpmSe ligand chelated and the other monodentate through phosphorus. On the other hand, for the apeSe system quantitative formation of Mo(CO)2( apeSe )2X2 was observed. For the apeSe system only, bubbling CO through a solution of M(CO)2( apeSe )2X2 gave M(CO)3( apeSe )2X2 with the ligands monodentate through arsenic. Extensive 31P and 77Se n.m.r. studies are described.

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